*{
  margin: 0;
  padding: 0;
  list-style: none;
}
.tree{}

.tree-item{
  margin: 8px 10px 0;
  overflow: hidden;
}
.tree-item.close{
  height: 26px;
}

.tree-title{
  display: flex;
  height: 26px;
  line-height: 26px;
}
.tree-title .folder{
  width: 17px;
  height: 17px;
  margin-top: 5px;
  transform: rotate(0);
  transition: .3s all ease;
}
.tree-title .folder.open{
  background: url('./common/img/down.svg') no-repeat;
  transform: rotate(0);
  cursor: pointer;
}

.tree-title .folder.close{
  background: url('./common/img/down.svg') no-repeat;
  transform: rotate(-90);
  cursor: pointer;
}

.tree-title .checkbox{
  width: 20px;
  background: url('./common/img/black.svg') no-repeat;
  margin: 3px 10px 0;
  cursor: pointer;
}

.tree-title .checkbox.checked{
  background: url('./common/img/checked.svg') no-repeat;
}
.tree-title .checkbox.half{
  display: block;
  width: 20px;
  background: url('./common/img/half.svg') no-repeat;
  margin: 3px 10px 0;
}
.tree-title .item{
  font-size: 12px;
  line-height: 26px;
}
.tree-title .checkbox-hidden{
  margin: 0 10px;
  cursor: pointer;
}
.tree-title .checkbox-hidden:hover{
  background: #1890ff;
  color: #ffffff;
}